Hill, David Octavius (1802-1870), was a Scottish photographer and painter of landscapes and portraits. Hill formed a partnership with photographer Robert Adamson in 1843 that had a strong influence on photographic technology by popularizing a process called calotype, which had been invented in 1841. In three years, Adamson and Hill took more than 3,000 photographs, mostly portraits and group pictures. Hill also painted a series of 60 landscapes titled The Land of Burns (1841), and a historical painting, Signing the Deed of Demission (1843-1865). Both relied heavily on photographs.